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CoorsTek ADOS-90R 91% Alumina Thick Film Substrate
Categories: Ceramic; Oxide; Aluminum Oxide
Material Notes: This 91-percent alumina (nominal) formulation offers a dark brown body for special applications. Applications: thick films and lasers
Key Words: Al2O3
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Physical PropertiesMetricEnglishComments
Density 3.72 g/cc0.134 lb/in³ASTM-C373
Water Absorption 0.00 %0.00 %ASTM-C373
Particle Size 5.0 - 7.0 µm5.0 - 7.0 µmGrain Size; Intercept Method
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell 45 N 7878ASTM-E18
Modulus of Elasticity 310 GPa45000 ksiASTM-C623
Flexural Strength 365 MPa52900 psiASTM-F394
Poissons Ratio 0.240.24ASTM-C623
Shear Modulus 125 GPa18100 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  7.00e+6 ohm-cm
@Temperature 700 °C		7.00e+6 ohm-cm
@Temperature 1290 °F		ASTM-D1829
 4.00e+8 ohm-cm
@Temperature 300 °C		4.00e+8 ohm-cm
@Temperature 572 °F		ASTM-D1829
 >= 1.00e+14 ohm-cm
@Temperature 25.0 °C		>= 1.00e+14 ohm-cm
@Temperature 77.0 °F		ASTM-D1829
Dielectric Constant  10.3
@Frequency 1e+6 Hz		10.3
@Frequency 1e+6 Hz		ASTM-D150
 11.8
@Frequency 1000 Hz		11.8
@Frequency 1000 Hz		ASTM-D150
Dielectric Strength 21.3 kV/mm
@Thickness 0.635 mm		540 kV/in
@Thickness 0.0250 in		60 cycles AC avg. RMS; ASTM-D149
Dissipation Factor  0.0050
@Frequency 1e+6 Hz		0.0050
@Frequency 1e+6 Hz		ASTM-D150
 0.10
@Frequency 1000 Hz		0.10
@Frequency 1000 Hz		ASTM-D150
Dielectric Loss Index  0.050
@Frequency 1e+6 Hz		0.050
@Frequency 1e+6 Hz		Loss Factor; ASTM-D150
 1.2
@Frequency 1000 Hz		1.2
@Frequency 1000 Hz		Loss Factor; ASTM-D150
 
Thermal PropertiesMetricEnglishComments
CTE, linear  6.40 µm/m-°C
@Temperature 25.0 - 200 °C		3.56 µin/in-°F
@Temperature 77.0 - 392 °F		ASTM-C372
 7.30 µm/m-°C
@Temperature 25.0 - 500 °C		4.06 µin/in-°F
@Temperature 77.0 - 932 °F		ASTM-C372
 8.00 µm/m-°C
@Temperature 25.0 - 800 °C		4.44 µin/in-°F
@Temperature 77.0 - 1470 °F		ASTM-C372
 8.40 µm/m-°C
@Temperature 25.0 - 1000 °C		4.67 µin/in-°F
@Temperature 77.0 - 1830 °F		ASTM-C372
Thermal Conductivity  8.00 W/m-K
@Temperature 400 °C		55.5 BTU-in/hr-ft²-°F
@Temperature 752 °F
 12.0 W/m-K
@Temperature 100 °C		83.3 BTU-in/hr-ft²-°F
@Temperature 212 °F
 13.0 W/m-K
@Temperature 20.0 °C		90.2 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
 
Component Elements PropertiesMetricEnglishComments
Al2O3 91 %91 %
 
Descriptive Properties
ColorDark Brown
PermeabilityNIL
Surface Finish - (µin.)<1.14as-fired; Profilometer, 0.0002" Radius Stylus, 0.100" Cutoff, ANSI/ASME B46.1
 <45CLA; Profilometer, 0.0002" Radius Stylus, 0.100" Cutoff, ANSI/ASME B46.1

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